Baby development at week 27
Brain tissue increases rapidly. Hiccups may feel like rhythmic taps. Fat layers smooth the skin’s wrinkled look.
Average size estimates for week 27 are about 36.6 cm and 875 g — roughly cauliflower. Your ultrasound report and clinician’s dating override any website average.
What you might feel
Nesting urges or planning energy can surge — or exhaustion can dominate. Both are valid.
You are in the second trimester. Two pregnancies at the same week can feel completely different — treat these notes as orientation, not a checklist you must match.
Noticing movement in week 27
Flutters often become clearer around mid-pregnancy, though timing varies widely. You do not need a formal count yet for every pregnancy — casual awareness is enough. When patterns feel regular later, Preglo’s kick counter is ready without a separate app.
What to track this week
- Symptoms, mood, sleep, and energy in your daily log
- Water intake toward a simple daily goal
- Appointment dates and questions for your care provider
- Scan dates and follow-up notes after ultrasound visits
- Kick sessions once movements feel regular — same time of day when you can
A calm next step in Preglo
Glance at your trimester progress in Preglo and skim the week-by-week guide for what is next.
Also useful: due date calculator · all weeks · Preglo features
Nearby weeks: Week 25 · Week 26 · Week 28 · Week 29
Educational averages only — not medical advice. Contact your clinician for symptoms that worry you, bleeding, severe pain, or reduced movements.